JPS5673248A - Planetary type speed change gear - Google Patents
Planetary type speed change gearInfo
- Publication number
- JPS5673248A JPS5673248A JP14994179A JP14994179A JPS5673248A JP S5673248 A JPS5673248 A JP S5673248A JP 14994179 A JP14994179 A JP 14994179A JP 14994179 A JP14994179 A JP 14994179A JP S5673248 A JPS5673248 A JP S5673248A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- valve
- opened
- modulation
- back pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Transmission Device (AREA)
Abstract
PURPOSE: To prevent interruption of power transmission, by providing a logic valve in a back-pressure chamber of each load piston for modulation valves corresponding to a plurality of gear positions, and overlapping two gear positions temporarily at the time of shifting the gear position.
CONSTITUTION: When the gear position of a vehicle is set at the second-speed position, the third-speed, second speed logic valve 5a is opened but the first-speed logic valve 5b is closed, so that back pressure of the third-speed modulation valve 4a is drained whereas back pressure is developed to the second-speed modulation valve 4b. Further, when the first-speed solenoid valve 2c is opened and the first speed and the second speed are overlapped to each other, main hydraulic pressure is supplied to the first-speed clutch 3c and the first-speed logic valve 5b is also opened. Resultantly, back pressure of the second-speed modulation valve 4b is drained and hydraulic pressure acted to the second-speed clutch 3b is reduced gradually. Subsequently, when the filling time of the first speed is passed, the second-speed solenoid valve 2b is closed.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14994179A JPS5673248A (en) | 1979-11-21 | 1979-11-21 | Planetary type speed change gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14994179A JPS5673248A (en) | 1979-11-21 | 1979-11-21 | Planetary type speed change gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5673248A true JPS5673248A (en) | 1981-06-17 |
Family
ID=15485908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14994179A Pending JPS5673248A (en) | 1979-11-21 | 1979-11-21 | Planetary type speed change gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5673248A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990005865A1 (en) * | 1988-11-24 | 1990-05-31 | Kabushiki Kaisha Komatsu Seisakusho | Method and apparatus for controlling transmission |
| US5231898A (en) * | 1988-11-24 | 1993-08-03 | Kabushiki Kaisha Komatsu Seisakusho | Method and apparatus for controlling transmission system |
-
1979
- 1979-11-21 JP JP14994179A patent/JPS5673248A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990005865A1 (en) * | 1988-11-24 | 1990-05-31 | Kabushiki Kaisha Komatsu Seisakusho | Method and apparatus for controlling transmission |
| US5231898A (en) * | 1988-11-24 | 1993-08-03 | Kabushiki Kaisha Komatsu Seisakusho | Method and apparatus for controlling transmission system |
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